Incest [silent] Incest - my dad is next to me...

Recently, my husband's stepchild Haruo has been acting strangely. He suddenly stood behind me, and suddenly tried to hug me. Even when I consulted my husband, there was no island where I would hang out with him saying, "It's because they're parents and children." But my unpleasant feeling was correct. One day, I saw Haruo masturbating using my underwear. Haruo, who was so angry, attacked me. And when I felt a danger, I immediately said this: "I'll do it with your mouth!" Looking back, that word was the beginning of it all. After that, Haruo began to attack me, even if his master was in front of me...